PROGRAMMING:Group email

As a professional HR, if you want to send e-mail to all the employees of a project group, you already know that HR has the name, telephone number and e-mail address of all the employees. Please write a program to take out the e-mail address of all the employees and merge them into a list of e-mail addresses, with ";" Separate them so that they can send mail in groups.
###Input format:
Give everyone's name, telephone number and email address in one line, for example: Lili / 13539870198/ lili@qq.com , TIANTI / 13408791122/ tiant@qq.com
###Output format:
A list of mailbox in a row, separated by semicolons.
###Input example:
Here is a set of inputs. For example:
```in
Lili / 13539870198/ lili@qq.com , TIANTI / 13408791122/ tiant@qq.com , Nannan / 13112034567/ nn@qq.com
```
###Output example:
The corresponding output is given here. For example:
```out
lili@qq.com; tiant@qq.com; nn@qq.com;
```







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